Optical inspection device

Abstract

An optical inspection apparatus 1 includes a light radiation unit 11 configured to radiate light to an article 50 , a light detection unit 12 configured to detect transmitted light of the light radiated to the article 50 , and a support unit 13 configured to support the light radiation unit 11 and the light detection unit 12 in a cantilever manner. An inspection region of the article 50 by the light is exposed to an ambient atmosphere.

The invention claimed is: 
     
       1. An optical inspection apparatus comprising:
 a light radiation unit configured to radiate near infrared light to an article; 
 a light detection unit configured to detect transmitted light of the near infrared light radiated to the article; and 
 a support unit configured to support the light radiation unit and the light detection unit in a cantilever manner; 
 wherein an inspection region of the article by the near infrared light is exposed to an ambient atmosphere, 
 wherein the light radiation unit and the light detection unit are rotatable integrally with the support unit about a position as a center of rotation of the light radiation unit, the light detection unit, and the support unit, the position being at a shorter distance from the light radiation unit than a distance from the light detection unit, and 
 wherein the light radiation unit, the light detection unit, and the support unit are configured to be rotatable while being fixed with respect to each other. 
 
     
     
       2. The optical inspection apparatus according to  claim 1 , wherein the light detection unit is disposed upward relative to the light radiation unit. 
     
     
       3. The optical inspection apparatus according to  claim 1 , wherein the light radiation unit and the light detection unit are vertically movable integrally with the support unit. 
     
     
       4. The optical inspection apparatus according to  claim 3 , wherein a position of the light detection unit is adjustable relative to that of the light radiation unit. 
     
     
       5. The optical inspection apparatus according to  claim 1 , wherein the support unit includes:
 a pole unit; 
 a first beam unit fixed to the pole unit at one end thereof and configured to support the light radiation unit; and 
 a second beam unit fixed to the pole unit at one end thereof and configured to support the light detection unit. 
 
     
     
       6. The optical inspection apparatus according to  claim 1 , further comprising a control unit configured to acquire a light transmission image of the article having contents contained in a package from the light detection unit, to set an inspection region corresponding to a sealed portion of the package based on a positional relationship of the sealed portion saved in advance, and to inspect the contents caught in the sealed portion with targeting the inspection region.